Street-lighting luminaire

ABSTRACT

A street-lighting luminaire having an enclosed optical system adapted for containing a vertically burning mercury vapor lamp. The luminaire includes an overhead housing assembly separated by a dish-shaped reflector from a downwardly depending sealed optical assembly. A ballast assembly, socket mounting and positioning assembly and luminaire mounting bracket are located within the overhead housing assembly. The socket mounting and positioning assembly is mounted on the reflector within the overhead housing assembly and is constructed and arranged to provide for the horizontal and vertical adjustable repositioning of a lamp socket which is mounted on the lamp mounting and positioning assembly and which extends, through an aperture centrally located in the reflector, into the sealed optical assembly.

United States Patent [72] lnventor John B. Arens Cleveland, Ohio [21]Appl. No. 776,489 [22] Filed Nov. 18,1968 [45] Patented June 29,1971[73] Assignee Westinghouse Electric Corporation Pittsburge, Pa.

[54] STREET-LIGHTING LUMINAIRE 6 Claims, 8 Drawing Figs.

[52] U.S. Cl 240/25, 240/44.2 [S1] lnt.Cl F21s 1/10 [50] Field of Search240/25. 44.2, 11.2, 11.4, 147

[5 6] References Cited UNITED STATES PATENT I 2,977,461 3/1961 Jones240/44.2 X 3,204,092 8/1965 Jablonski. 240/25 3,219,812 11/1965 Turner240/44.2 X 3,299,263 l/1967 Bjontegard 240/44.2 X

66 4 t-- 2 II Primary Examiner-Samuel S. Matthews AssistantExaminerRichard M. Sheer .4!t0rneysA. T. Stratton, W. D. Palmer and B.R. Studebaker ABSTRACT: A street-lighting luminaire having an enclosedoptical system adapted for containing a vertically burning mercury vaporlamp. The luminaire includes an overhead housing assembly separated by adish-shaped reflector from a downwardly depending sealed opticalassembly. A ballast assembly, socket mounting and positioning assemblyand luminaire mounting bracket are located within the overhead housingassembly. The socket mounting and positioning assembly is mounted on thereflector within the overhead housing assembly and is constructed andarranged to provide for the horizontal and vertical adjustablerepositioning of a lamp socket which is mounted on the lamp mounting andpositioning assembly and which extends, through an aperture centrallylocated in the reflector, into the sealed optical assembly.

PATENTEUJUNZSIQYI 3590.238

SHEET 1 OF 2 VZELjIQ B Jotls B i zfens J1; [rm

ATTORNEY PATENTEI] JUN29 I97] SHEET 2 [IF 2 STREET-LIGHTING LUMINAIREBACKGROUND OF THE INXENTION This invention relates to street'lightingluminaires and more particularly to a street-lighting luminaire having asubstantially sealed optical system and a vertically and horizontallyadjustable lamp socket.

In the street-lighting luminaire art two problems that have faced thefixture manufacturer as well as persons responsible for the installationand maintenance of the luminaires in the field have been the ability toadjust the lamp position to provide for a proper or preferred lightdistribution pattern as well as to reduce the requirement formaintenance in the form of refractor and lamp cleaning due to theingress of the dirt particles into the optical cavity of the luminaire.These problems are of course applicable to all types of street-lightingluminaires and are not unique to luminaires which employ a base-up orvertical burning light source.

One solution that has been proposed for rendering the lamp socketadjustable with respect to the optical cavity, and thereby provide theability to adjust the light distribution pattern, has been to permitvertical adjustment of the lamp position. Prior art methods ofperforming this function have however required generally thesubstantially total disassembly of the lamp socket from its mountingsurface and the insertion or removal of spacers to obtain the desiredvertical position for the light center within the optical cavity. Ofcourse, this type of adjustment as well as being cumbersome provided forthe adjustment of the light center in only a vertical direction whereasa total ability to provide for selected light distribution patternsrequires that the light center be both vertically and horizontallyadjustable.

SUMMARY OF THE INVENTION It is an object of this invention to provide astreet-lighting luminaire in which the lamp socket is verticallyadjustable with respect to the luminaire housing.

Another object of the present invention is to provide a street-lightingluminaire in which the lamp socket is horizontally adjustable withrespect to the luminaire housing.

A further object of the present invention is to provide astreet-lighting luminaire of the vertical burning light source type inwhich the light source is located within a substantially sealed opticalsystem.

Yet another object of the present invention is to provide astreet-lighting luminaire of the vertically burning light source type inwhich the light source is both horizontally and vertically adjustablewith respect to the optical cavity and in which the optical cavity issubstantially sealed off with respect to the ingress of particle-sizecontaminants.

The foregoing objects, along with others, are readily achieved inaccordance with the present invention by providing a street-lightingluminaire which comprises a top housing assembly, a downwardly dependingoptical assembly and a reflector secured to the top housing assembly andseparating the top housing assembly from the optical assembly. A lampsocket mounting and positioning means is carried by the reflector andconstructed and arranged to provide for both selective horizontal andselective vertical positioning of the lamp socket with respect to theoptical assembly. The streetlighting luminaire further includes a gasketmeans between said reflector and the refractor of the optical assemblyto provide for a substantially sealed optical system and thereby preventthe ingress of particle-size contaminants during operation of theluminaire.

BRIEF DESCRIPTION OF THE DRAWING detailed description is considered inconnection with accompanying drawing in which:

FIG. 1 is a vertical sectional view of the luminaire of the presentinvention taken along the line l-I of FIG. 2;

FIG. 2 is a horizontal sectional view taken along the line lI-Il ofFlG.1;

FIG. 3 is a sectional view of the hinge mechanism taken along the lineIll-Ill of FIG. 2;

FIG. 4 is a sectional view taken along line IV of FIG. 2 illustratingthe latch mechanism of the present invention;

FIG. 5 is a top plan view of the holding clip mechanism of the presentinvention;

FIG. FIG. 6 is a sectional view taken along the line Vl-Vl of FIG.

FIG. 7 is a top plan view of an indexing clip; and FIG. 8 is a sectionalview taken along the line VIII-VIII of FIG,.7.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now in detail to thedrawing wherein like reference characters represent like partsthroughout several view, there is shown in FIG. 1 a vertical section ofthe luminaire of the present invention. The luminaire conventionallyincludes a housing assembly generally designated 10 and an opticalassembly generally designated 12. The optical assembly includes therefractor 14, the reflector 16 and their associated parts.

Mounted within the outer cover 18 of the housing assembly 10 andarranged about the lamp socket 20 are the conventional electricalcomponents required to operate a gas discharge lamp as for example thetransformer 22, the capacitor 24, the terminal block 26 (FIG. 2) and theluminaire mounting bracket or pipe receptible 28.

The bottom of the housing assembly 10 is closed off by the reflector 16which is secured to the housing by means of a plurality of threadedbolts 30 which secure the reflector to bosses 32 in the housing covermember 18. The socket mounting assembly is mounted to the upper side ofreflector 16 about an elongated aperture 36 which has paralleltherewith, in the reflector 16, a pair of elongated slots 38. Thesocket-mounting assembly generally designated 34 includes a pressureplate 40 having an upstanding socket bracket 42 integral therewith. Thelamp socket 20 is mounted to the socket bracket by a band 44 whichextends around the socket 20 and into the socket clamp 42. A threadedtightening bolt 46 permits the band to be loosened or tightened aboutthe socket 20. To vertically adjust the position of the lamp 48 withrespect to the optical assembly 12 the bolt 46 is loosened slightly thusloosening the band 44 about the socket 20, the socket is then positionedvertically in a selected position and the bolt 46 tightened to securethe band about the socket 20 and thus firmly hold the socket 20 in anyof a number of preselected vertical positions.

Horizontal adjustment of the lamp is accomplished by means of a pair ofbolts 50 which extend through slots 38 in reflector l6 and are threadedinto the mounting plate 40. To adjust the lamp socket 20 to any of anumber of horizontal positions with respect to the optical assembly thebolts 50 are loosened and the socket assembly slid laterally in theaperture 36 until the preselected position is reached at which point thebolts 50 are tightened to firmly retain the lamp socket 20 in itsselected horizontal position. To prevent the ingress of dirt and otherparticle-size contaminants into the optical assembly through theaperture 36 a gasket 52 which may be of Dacron or fiber glass is fittedaround the lamp socket and compressed between the socket-mounting plate40 and the reflector 16 as illustrated in FIG. 1. At least one of thebreather holes 51 in the socket-mounting plate 40 are always incommunication with the portion of the aperture 36 not filled by the lampsocket to permit the ingress and egress of filtered air as will be laterdescribed.

As can be seen from the foregoing the socket-mounting assembly 34provides for the selective adjustable positioning of the lamp socket 20both in the horizontal and vertical directions as well as providing aseal between the housing assembly and the optical assembly about thelamp socket. Several of the adjustable positions of the lamp 48 areillustrated in phantom in FIG. 1. If desired, horizontal position'indicia can be provided on the underside of the reflector asillustrated at 54.

The globe or refractor 14 is mounted in a globe ring 56 which is hingedat 58 (FIG. 3) and latched to the housing assembly opposite the hinge 58by a single acting overcenter latch 60 (FIG. 4). The globe ring 56includes an annular internal flange 62 which coacts with an annularexternal flange 64 on the globe or refractor 14 to facilitate thecarrying of the globe or refractor by the globe ring 56. To firmlysecure the refractor 14 to the globe ring 56 a plurality of releasablespring clips 66 (FIGS. and 6) are secured to the globe ring by holddownscrews 68. Spring clips 66 have an upstanding finger flange 67 whichpermits the spring clip to be moved toward or away from the refractorflange 64. The holddown screws 68 slide in a slot 69 in the spring clipto retain the clip on the ring but allow relative movement with respectto the ring. FIG. 6 illustrates the spring clip 66 in its retracted oropen position which permits the refractor to be lifted from the globering. FIG. 1 illustrates the spring clip 66 in its operative positionwith the leading edge of the spring clip overlying the top of the upperrim of the refractor thus providing a positive grip of the refractorflange 64 between the flange 62 of the globe ring and the leading edgeof the spring clip 66.

As illustrated in FIGS. 7 and 8 an indexing the optics 70 may also besecured to the globe ring 56 to provide for the accurate mounting of therefractor 14 in the globe ring 56. Since the refractor 14 may have awide variety of optics and it is customary for such optics to provide aspecific light distribution pattern about the luminaire, it is thereforeessential that the refractor be located in a specific orientation withrespect to the mounting bracket or pole to which the luminaire isaffixed. This accomplished in the luminaire of the present invention bythe index clip 70 which includes a downwardly projecting flange 72 whichcoacts with a separation 71 in the refractor flange 64 to position theoptics of the refractor in a specific orientation with respect to theglobe ring 56 and hence the mounting pole to which the luminaire isattached.

In order to complete the'seal of the optical assembly the reflector 16includes therein an annular depression 73 in the underside thereof inwhich there is secured an annular gasket 74. The annular gasket 74 ispreferably of the silicon or neoprene type and is cemented into theannular depression 73. When the optical assembly is closed and the globering latched to the housing assembly by the latch 60 the upper edge ofthe refractor 14 slightly depresses the gasket 74 to thereby provide aseal between the reflector and refractor and produce a substantiallysealed optical cavity. The Dacron or Fiberglass gasket 52 situatedbetween the reflector and the socket-mounting plate serves as a filterfor contaminants and dirt particles which would normally flow into theoptical cavity during operation of the luminaire. As the optical cavityis heated up during operation of the lamp 48, pressure within theoptical assembly also increases and causes a flow of air out of theoptical cavity through that portion of aperture 36 not filled by thelamp socket and breather holes 51. When the lamp is shut off and theoptical cavity cools there is then an inflow of air into the opticalcavity and in the luminaire of the present invention such inflow alsooccurs through breather holes 51 and that portion of aperture 36 notfilled by the lamp socket and therefore occurs through the gasket 52which serves as a filter to prevent dirt and other particle-sizecontaminants from accompanying the airflow into the optical cavity.

The luminaire of the present invention is adapted for mounting with thelight source 48 in a vertical, base-up, position and may be mounted to aconventional mounting pole 80 by the pipe or mounting bracket 28. Theluminaire is secured to the pole 80 by a threaded bolt 82 in the housingcover and a threaded bolt 84 in the mounting bracket 28. Adjustment orleveling of the luminaire is accomplished by the adjusting mechanism 86which permits the luminaire to be tilted with respect to the mountingpole 80.

As will be apparent from the foregoing the luminaire of the presentinvention provides for both the horizontal and vertical adjustment ofthe light source with respect to the luminaire and also provides asubstantially sealed optical assembly which inhibits the entrance ofdirt or other particle-size contaminants from entering therein.

Since numerous changes may be made in the abovedescribed invention anddifferent embodiments thereof may be made without departing from thespirit thereof, it is intended that all matter containedin the foregoingdescription or shown in the accompanying drawings, shall be interpretedas illustrative and not in a limiting sense.

I claim as my invention:

1. A street-lighting luminaire comprising:

a top housing assembly and a downwardly depending optical assembly,

a dish-shaped reflector secured to said top housing assembly separatingsaid top housing assembly from said optical assembly and having anelongated aperture therein located substantially centrally thereof,

lamp socket means extending through said aperture in said reflectoradapted to receive a vertically burning light source,

socket-mounting and positioning means releasably secured to saidreflector adjacent said aperture by a first adjustment means and havingthereon second adjustment means for releasably securing said lamp socketmeans, in a vertical orientation, to said socket-mounting andpositioning means, said first adjustment means selectively adjusting thelateral position of said lamp socket means with respect to saidreflector and said second adjustment means selectively adjusting thevertical position of said lamp socket means into or out of said opticalassembly.

2. A street-lighting luminaire according to claim 1 wherein gasket meansis positioned about said lamp socket means between said socket-mountingand positioning means and said reflector for closing off the area ofsaid elongated aperture not filled by said lamp socket means.

3. A street-lighting luminaire comprising:

a top housing assembly and a downwardly depending optical assembly,

a dish-shaped reflector secured to said top housing assembly separatingsaid top housing assembly from said optical assembly and having anelongated aperture therein located substantially centrally thereof and apair of smaller elongated apertures parallel to said elongated centralaperture on each side of said elongated centrally located aperture, lampsocket-mounting and positioning means, means for releasably securingsaid lamp socket-mounting and positioning means to said reflectorthrough said smaller elongated apertures and for providing adjustablelateral selective positioning of said lamp socket-mounting andpositioning means with respect to said reflector, a lamp socket mountedon said lamp socket-mounting and positioning means and extending throughsaid larger elongated aperture in said reflector into said opticalassembly, said socket-mounting and positioning means releasablyretaining said lamp socket in a vertical orientation for verticalrepositioning of said lamp socket with respect to said optical assembly.

4. A street-lighting luminaire according to claim 3 wherein said lampsocket-mounting and positioning means includes a baseplate memberoverlying said larger elongated aperture and an upstandingsocket-mounting flange and clamping-band assembly, said mounting-flangeand clamping-band assembly permitting the selective vertical positioningof said lamp socket with respect to said optical assembly.

5. A street-lighting luminaire according to claim 4 wherein saidbaseplate member is adjustably secured to said reflector by means ofsaid smaller elongated apertures to permit lateral movement of said lampsocket-mounting and positioning gasket means is situated between saidbaseplate member and said reflector seal off communication between saidhousing and said optical assembly through said elongated apertures insaid reflector.

1. A street-lighting luminaire comprising: a top housing assembly and adownwardly depending optical assembly, a dish-shaped reflector securedto said top housing assembly separating said top housing assembly fromsaid optical assembly and having an elongated aperture therein locatedsubstantially centrally thereof, lamp socket means extending throughsaid aperture in said reflector adapted to receive a vertically burninglight source, socket-mounting and positioning means releasably securedto said reflector adjacent said aperture by a first adjustment means andhaving thereon second adjustment means for releasably securing said lampsocket means, in a vertical orientation, to said socket-mounting andpositioning means, said first adjustment means selectively adjusting thelateral position of said lamp socket means with respect to saidreflector and said second adjustment means selectively adjusting thevertical position of said lamp socket means into or out of said opticalassembly.
 2. A street-lighting luminaire according to claim 1 whereingasket means is positioned about said lamp socket means between saidsocket-mounting and positioning means and said reflector for closing offthe area of said elongated aperture not filled by said lamp socketmeans.
 3. A street-lighting luminaire comprising: a top housing assemblyand a downwardly depending optical assembly, a dish-shaped reflectorsecured to said top housing asSembly separating said top housingassembly from said optical assembly and having an elongated aperturetherein located substantially centrally thereof and a pair of smallerelongated apertures parallel to said elongated central aperture on eachside of said elongated centrally located aperture, lamp socket-mountingand positioning means, means for releasably securing said lampsocket-mounting and positioning means to said reflector through saidsmaller elongated apertures and for providing adjustable lateralselective positioning of said lamp socket-mounting and positioning meanswith respect to said reflector, a lamp socket mounted on said lampsocket-mounting and positioning means and extending through said largerelongated aperture in said reflector into said optical assembly, saidsocket-mounting and positioning means releasably retaining said lampsocket in a vertical orientation for vertical repositioning of said lampsocket with respect to said optical assembly.
 4. A street-lightingluminaire according to claim 3 wherein said lamp socket-mounting andpositioning means includes a baseplate member overlying said largerelongated aperture and an upstanding socket-mounting flange andclamping-band assembly, said mounting-flange and clamping-band assemblypermitting the selective vertical positioning of said lamp socket withrespect to said optical assembly.
 5. A street-lighting luminaireaccording to claim 4 wherein said baseplate member is adjustably securedto said reflector by means of said smaller elongated apertures to permitlateral movement of said lamp socket-mounting and positioning means withrespect to said reflector to thereby permit selective horizontalpositioning of said lamp socket with respect to said reflector.
 6. Astreet-lighting luminaire according to claim 5 wherein gasket means issituated between said baseplate member and said reflector seal offcommunication between said housing and said optical assembly throughsaid elongated apertures in said reflector.